Corporal Jake Sully was paralyzed from the waist down when he was shot in the back, during a battle in Venezuela. He was (is) a Marine in the what can only be assumed as the United States Marine Corps. When a person is paralized and their legs or arms or whatever paralyzed part goes so long unused the muscles eventually wither and "die". His legs were at one time normal like any other human beings but years of not being used withered them away.
- This doesn't answer the question. The question is HOW, not WHY. I've read they were prosthetics. I've also read they were CG. If they were prosthetics, how did they hide his real legs? I don't l know which answer is true.